I'll look into Meinberg.
I recent thread mentioned high-sensitivity receivers often allow GPS to work inside. Obviously "inside" has a lot of definitions. I will need this facility for the TDM timing signals. It's a central office, not a datacenter. I don't know that Internet-based NTP would be accurate enough for the timing signals that I need. Maybe, maybe not. ----- Mike Hammett Intelligent Computing Solutions Midwest Internet Exchange The Brothers WISP ----- Original Message ----- From: "Majdi S. Abbas" <m...@latt.net> To: "Mike Hammett" <na...@ics-il.net> Cc: nanog@nanog.org Sent: Thursday, July 11, 2019 9:54:26 AM Subject: Re: Time and Timing Servers On Thu, Jul 11, 2019 at 09:29:46AM -0500, Mike Hammett wrote: > There were a lot of NTP threads several weeks ago, but I didn't get an answer > to my question amongst all of the other chatter. > > I'm looking for a device that can receive GPS inside a building without the > assistance of an external antenna (Frontier says they no longer allow > external antenna), will provide traditional NTP services, and will provide > a timing signal that my Metaswitch can work with. Unfortunately, L band satellite signals are incredibly weak by the time they reach the surface. It's very unlikely this is going to work for you (unless it's a wood framed single story building.) Generally, I try to ensure that a GNSS antenna is built into the contract, to avoid games like this. You have two options: A) Find a new colocation provider. This may already be on your to-do list for other reasons. B) Rely on the Internet for timing, using NTP or PTP from another location to backfeed the site, and use a box with a good stable oscillator to keep time (this can actually be a commercial time server with decent holdover characteristics. If you're just looking for alternatives to Microsemi, I highly recommend talking to the fine folks at Meinberg. --msa
